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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ShadowRoot.h"
#include "Element.h"
#include "Document.h"
#include "NodeRareData.h"
// FIXME: This dependency might look strange. But it should be sane. See https://bugs.webkit.org/show_bug.cgi?id=59117
#include "ShadowContentElement.h"
namespace WebCore {
ShadowRoot::ShadowRoot(Document* document)
: TreeScope(document)
{
ASSERT(document);
// Assume document as parent scope.
setParentTreeScope(document);
// Shadow tree scopes have the scope pointer point to themselves.
// This way, direct children will receive the correct scope pointer.
ensureRareData()->setTreeScope(this);
}
ShadowRoot::~ShadowRoot()
{
}
String ShadowRoot::nodeName() const
{
return "#shadow-root";
}
Node::NodeType ShadowRoot::nodeType() const
{
return SHADOW_ROOT_NODE;
}
PassRefPtr<Node> ShadowRoot::cloneNode(bool)
{
// ShadowRoot should not be arbitrarily cloned.
return 0;
}
bool ShadowRoot::childTypeAllowed(NodeType type) const
{
switch (type) {
case ELEMENT_NODE:
case PROCESSING_INSTRUCTION_NODE:
case COMMENT_NODE:
case TEXT_NODE:
case CDATA_SECTION_NODE:
case ENTITY_REFERENCE_NODE:
return true;
default:
return false;
}
}
void ShadowRoot::recalcStyle(StyleChange change)
{
for (Node* n = firstChild(); n; n = n->nextSibling())
n->recalcStyle(change);
clearNeedsStyleRecalc();
clearChildNeedsStyleRecalc();
}
ContainerNode* ShadowRoot::contentContainerFor(Node* node)
{
// Current limitation:
// - There is at most one content element for each shadow tree
// - The shadow tree accepts any light node.
for (Node* n = firstChild(); n; n = n->traverseNextNode(this)) {
// FIXME: This should be replaced with tag-name checking once <content> is ready.
// See also http://webkit.org/b/56973
if (n->isShadowBoundary() && static_cast<ShadowContentElement*>(n)->shouldInclude(node))
return toContainerNode(n);
}
return 0;
}
void ShadowRoot::hostChildrenChanged()
{
if (!hasContentElement())
return;
Element* host = shadowHost();
if (!host || !host->attached())
return;
host->detach();
host->lazyAttach();
}
bool ShadowRoot::hasContentElement() const
{
for (Node* n = firstChild(); n; n = n->traverseNextNode(this)) {
// FIXME: This should be replaced with tag-name checking once <content> is ready.
// See also http://webkit.org/b/56973
if (n->isShadowBoundary())
return true;
}
return false;
}
bool ShadowRoot::applyAuthorSheets() const
{
return false;
}
}
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